You are right, but at this point in time, we sell a bit of crude oil to feed the infrastructure that is there. What we do NOT do is add any value - that's where the big numbers in jobs and wealth creation hide. What you do have to keep in mind, though: depending on whose numbers and how you interpret, the Athabasca Oil Sands is either a larger produceable reserve than the Persian Gulf or a larger reservoir than all of the rest of the world...combined. We WILL run out of "cheap oil", but the heavy (and expensive to produce - i.e. LOTS more jobs in the production side) will last longer than anyone else. And, you are correct to point out that it is used for a LOT of other things, but as I said, we need to add a lot more value before we export what we produce.
Right now, we built a huge energy industry, then just dropped it flat on its face without doing anything to either a) taper it off, or far better b) shift the work to adding value.